Finding the Fourth Proportional to 9,413.96, 12,989.97 and 5,436.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.96 : 12,989.97 = 5,436.05 : x
2. Step 2: Convert to fraction form
   9,413.96/12,989.97 = 5,436.05/x
3. Step 3: Cross multiply
   9,413.96x = 12,989.97 × 5,436.05
4. Step 4: Simplify right side
   9,413.96x = 70,614,061.47
5. Step 5: Solve for x
   x = 70,614,061.47/9,413.96
6. Step 6: Final answer
   x = 7,501.00